package String3;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 洪汤泽大帅哥
 * Date: 2024-11-14
 * Time: 23:13
 */
public class demo4 {
    public static void main(String[] args) {
        StringBuilder stringBuilder = new StringBuilder("hello");
        stringBuilder.insert(1,"xxx");
        System.out.println(stringBuilder.toString());
    }
}
